Learn Dutch: De zwarte katten slapen.

When an adjective comes directly before a noun, we usually add an -e to it. The dictionary word for "black" is zwart. Because katten is a plural noun, the adjective gets the -e ending, making it zwarte.

Why does katten have two 't's when the singular word kat only has one?

This happens because of Dutch spelling rules for keeping vowels short. The 'a' in kat is a short vowel. When we add the plural ending -en, we must double the consonant ('t') to keep that short 'a' sound. If it were spelled "katen", it would be pronounced with a long 'a'.

Could this sentence also mean "The black cats are sleeping"?

Yes, absolutely! Dutch does not have a separate continuous tense like English does. The present tense verb slapen translates to both "sleep" and "are sleeping" depending on the context.

Why do we use de for "the" in this sentence?

In Dutch, we use de for all plural nouns, regardless of whether the singular noun is a de word or a het word. Since katten (cats) is plural, we automatically use de.